AQ_GEN_PIO_20230413_MISC_PressRls

Website: www.deq.nc.gov
Facebook: www.facebook.com/ncdeq
Twitter: @NCDEQ
1601 Mail Service Center, Raleigh, NC 27699-1601

Roy Cooper, Governor Elizabeth S. Biser, Secretary

Release: IMMEDIATE Contact: Shawn Taylor Date: April 13, 2023 Phone: [phone]
Public Comment Period Opens for Wolfspeed Air Quality Permit
RALEIGH – The N.C. Department of Environmental Quality’s Division of Air Quality (DAQ) is seeking public
comment on a draft air quality permit for Wolfspeed, Inc. – Siler City Factory.
Comments will be accepted until May 13, 2023.
The air quality permit would allow Wolfspeed to construct and operate a new semiconductor manufacturing plant
in Chatham County. The facility will be considered a major source under Title V of the Clean Air Act because
potential emissions of nitrogen oxides (NOx) will be 113 tons per year, which is above the 100 tons per year
major source threshold.
The draft permit would require the facility to use a gas scrubber system to control emissions of volatile organic
compounds, hazardous air pollutants and toxic air pollutants. A gas abatement system and particulate matter
collection devices will control emissions of additional pollutants.
Air dispersion modeling reviewed by DAQ shows the facility’s emissions will comply with applicable standards.
The draft permit includes conditions that ensure ambient levels of all pollutants beyond the facility’s fence line
comply with emission standards, including applicable health-based standards. The facility would also be subject
to recordkeeping requirements and regular inspections.
Copies of the public notice, draft permit, draft permit review, draft environmental justice report, permit
application, and a one-page project fact sheet are available online.
Comments or requests for a public hearing will be accepted until May 13, 2023, at 5 p.m. Comments can be
emailed to [e-mail] with “Wolfspeed.22A” in the subject line, or left via voice mail by
calling 919-707-8714. Comments can also be mailed to:
NCDEQ Division of Air Quality
1641 Mail Service Center
Raleigh, North Carolina 27699-1641
The Division will consider all public comments before making a final decision on the proposed permit.
Si necesita esta información en español por favor llame al 919-609-2189 o mande un correo a
[e-mail].
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